In the romp, the Wildcats got their 14th victory in 15 games.
"Andre Iguodala did a really good job off the bench," said Arizona Coach Lute Olson. "He is getting better and better every day. His shot looks really good and he is getting his shot off a lot quicker. He is making plays and it was great to see him do the job that he did for us tonight."
"Coach O drills it in our head to practice hard and we have been," Iguodala said. "And it paid off tonight. It flowed well. This may have been our best game of the whole season because everybody played a lot and scored, and after the game everybody was happy."
Arizona led just 35-32 after a layup by UCLA's Dijon Thompson with 2:21 left in the first half, but the Wildcats closed the half on a 10-2 run, then opened the second half on a 16-0 burst to take a 61-34 advantage on a jumper by Salim Stoudamire with 16:26 remaining.
"We had a great second half," Olson said. "We came out in the second half with great intensity and enthusiasm. We made a lot of things happen as a result of playing good defense. We scored a lot of points off of their turnovers. We had about 32 or 33 points off the breaks."
UCLA committed 19 turnovers, 10 more than Arizona.
Stoudamire and Jason Gardner scored 14 points apiece, and Rick Anderson and freshman Hassan Adams 12 each for the Wildcats (19-2, 11-1), who led by as many as 39 points as they maintained their one-game edge over California atop the Pac-20 standings.
Andre Patterson scored 12 points and Jason Kapono 11 for UCLA, which was outscored by a combined 71 points in its two games against Arizona this season.
On Jan. 18, the Wildcats handed the Bruins their worst defeat ever at Pauley Pavilion, 87-52.